Gear wheel



Jan. 27, 1925.

W. H. KEMPTON GEAR mmm.

Filed March 24, 1924 & 7

INVENTOR h/l//ard H. A'e/np ?fo/7.

'WTNESSESZ ATTORNEY Patented .lan. 27, 1925.

UNITED STATES I 1524555 PATENT OFFICE.

WILLABD H. KEMPTON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTING-HOUSE ELECTRIC Ge MANUFACTURING COMPANY, A CORPORATION OF PENNSYL-VANIA.

GEAR WEEEL.

Application filed March 24. 1924.

To all whom z't may concem:

Be it known that I, VVILLARD H. KEMI- TON, a citizen of the UnitedStates, and a resident of Pittsburgh, in'the county of Allegheny andState of Pennsylvania, have 4 invented a new and useful Improvement inments are particularly desirable because the' metal provides a structurewhich is not subject to warping. The metal center also provides asupport upon which the non-metallic material may be assembled and moldedinto a workin face having uniform structure and wearn qualities. Suchuniform distribution o the molded impregnated material also aids inproducing a well balaneed wheel.

Heretofore the hub, web and fiange portions of gear wheels upon whichthe nonmetallie working face was molded. were made of cast metal andthen machined to the desired dimensions. Such centers provided a goodsupport for the non-metallic material, but for certain classes of workthey were unnecessarily heavy. Metal centers of lighter material, suchas pressed steel, have been used, but the resonance and resiliency ofthe metal tended to transmit sound from the parts of the machine whichwere in contact with it. I

M invention is intended to obviate this disad vantage it being among theobjects thereof to provide a gear wheel having a light-weight metalcenter and a working face of molded -laminated material.

Another object of my invention is to provide a gear wheel having a metalcentral portion which is provided with a nonmetallic member foreliminating resonance and sound transmission therefrom.

In the drawin constituting a part hereof and in which li e numeralsdesignate like parts,

Figure 1 is a plan View of my gear wheel,

and

Fg. 2 is a cross sectional View of my gear whee taken along the lineII-II of Fig. 1. .The gear wheel 1 comprises a central Serial No.701,286.

metal hub 2 having a non-metallic annular ring portion 3 of fibrousmaterial impreg-` nated with a binder such as a phenolic condensationproduct and molded thereon with heat and pressure. A 'web member ofpunched sheet metal such as sheet steel comprises discs 4 and 5 whichare provided with central flanges 6 and 7 and outer flanges 8 and 9respectively. The metal web` members are fastened together by anysuitable means such as spot welds 10 or they may be held together merelyby molding them in the material 3 of the hub member and the material ofthe working face 11 when the wheel is assembled in the moldingoperation. Openings 13 are punched in the metal web members in order tolend resilience to the wheeland to decrease the weight;

The outer surface of the hub member 2, the inner fianges 6 and 7 and theouter flanges 8 and 9 are roughened or knurled in order to provide agripping surface for the moldedmaterial. The annular ring 3 and theworking face 11 are composed of fibrous material impregnated with aphenolic condensation product or other suitable binder and are combinedwith the metal hub 2 and the metal wb .member in a mold under heat andpressure. The gear teeth 12 are cut in theworking face 11 after the gearblank i s molded.

In-assembling the wheel, the metal hub 2 and the web members 4 and 5 areassembled in' the base of a mold which is suitabl Secured in the matrixand molding materia such as shredded duck or paper, or woodflour whichhas been impregnated with a phenolic condensation product, is placed inthe space between the fianges 6 and 7 and the metal hub 2. The workingface 11 may be formed by superimposing a plurality of' layers ofsimilarly impregnated duck on the face of the metal rim which is formedby the flanges 8 and 9. The mold is then closed by the plunger and issubjected to heat and pressure between the 'heated platens of ahydraulic press in order to cure the binder and to mold the ring 3 andworking face 11 to the desired shape.

This structure provides a wheel having a light-weight, strong, metalsupport and a non-'metallic working face. ,The working face 11 and theannular ring portion 3 between the metalweb and the metal hub provide ameans for eliminating'resonance in eo constituted as to provide a strongthe wheel and for reducing the transmis sion of sound from other machineelements in I bodiment of my invention I do not wish to be limitedthereto as` 'other methods of `con- 'structingmy gear wh'wl may beemployed without de arting from the' spirit of my nvention. v 'Fhe webmenber for example;

* may be made of variois kinds of metal or I When constructed of twodisks, they. may be employ a le punc'hed disk 'or sevupon w 'ch to 'formthe flanges.

united by wel dng' r riveting or by any other" suitable eas.` thermodifications ofmy invention will* suggest 'themselves to those 'skilledin the art without departing from the pirit oi my invention, the scopeof which is defined in the annexed claims.

I claim-as my invention:

.-1.' A wheel comprising a working face of molded fibrous materahaninner concentrically formed metal rtion, and a hu; oi molded flillousand 4 w compr 'a wor g faceof b l ded fibrous ml, -an inner formed metalrt'ion, and a 'hub of 'mol ed fibrous material and metal,

said'concentric metal portion co''prising a flange for supporting saidworkl face, a web and aflange'su'pported by said' ub.

3; A- wheel compris' face of molded. fibroua material' 'an innerconcentrically' formed metal web portion,

' and ahb of molded fibrous material and metal, said coneentric metalweb portion com two diecs provided with op y extending flanges' moldef ia working' said wor' fce and in the fibvus mate rial of said ub. V

4.A rwheel'conp" a face of molded fibrous a web member, a hub of molded.fibroue ma- &gia; and metal a d or supportng sai wo face en anotherflange in said web mem for anchoring to the fibrou material of eid hub.5. A wheel compr' a central hub of meta having 'a ring of rous materialmolded thereon, a two art metal web member, a flange formed tl ereon'for anchori in said ring and another flange thereon an v a non-metallicworking face supported by said second flange. I

6. A r wheel compris' a central hub of meta having a ring of rousmaterial molded thereon,` a two part metal web member of unched discs ofmetal united toher, ter'all extending central and outer anges form insaid diece and a nonmetallic'working facemolded'on said outer fiange 7.A gear wheel compris'ing a metal center, a metal web, molded materialtherebetwbeen, and a molded working face on said w 8. A gear wheelcomprsng' a metal center, a metal web concentric therewith, moldedmaterial 'therebetween, and a molded working face on said web.

9. 'A gear wheel comprisinga metal center, a metal web concentrictheewith, molded material therebetween, and a molded working face onsaid web, those parte of the metal members which are in contact with themolded portions being roughened.

In testimony whereof, I have hereunto eubscribed my name thieth day ofMarch, 1924. i

`WILLARD H. KEMPTON.

in said web mem= working ll metallic

